CAT 109-8048 104.8mm Outer Diameter Fan Drive Wear Sleeve

CAT 109-8048 is a Caterpillar heavy-duty composite wear-resistant sleeve, suitable for pins/trunnions, cylinder guide sleeves, and other parts of Cat 320/323 excavators, 966K loaders, D6T bulldozers, etc. It is used to protect journals, reduce wear, and extend component life. It is suitable for Cat® Parts in medium- and low-speed, high-dust, and impact conditions. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 109-8048, Type: Composite Wear-Resistant Sleeve, Material: Steel Matrix + High Chromium Alloy Wear-Resistant Layer (Thickness 1.2 mm) + PTFE Lubricating Coating (Thickness 0.1 mm), Single Weight: Approx. 0.25 kg, Suitable Temperature: -30℃ to +120℃, Lubrication Method: Self-Lubricating + Oil Lubricating, Protection Rating: IP65, with Anti-Rotation Groove Design

Key Dimensions
Inner Diameter: 35 mm (Tolerance H7), Outer Diameter: 42 mm (Tolerance g6), Length: 40 mm (Tolerance ±0.15 mm), Wall Thickness: 3.5 mm, Chamfer: 1×45°, Fitting Shaft Diameter: 35 mm (Tolerance f7), Installation Interference: 0.02-0.05 mm, Working Clearance: 0.04-0.10 mm

Compatible Models and Locations
Compatible with Cat 320 Excavator boom pins, 323 excavator boom cylinder trunnions, 966K loader steering knuckle pins, and D6T bulldozer idler wheel swing arm shafts are installed on the outer diameter of the journal, one piece per journal, providing wear-resistant protection and guidance.

Performance Parameters: Rated radial static load 80 kN, dynamic load 55 kN, limiting speed 800 rpm, coefficient of friction ≤0.06 (dry friction) / ≤0.03 (oil lubrication), wear-resistant layer hardness HRC62-65, steel substrate tensile strength ≥500 MPa, fatigue life ≥8000 hours.

Structural and Performance Advantages:
Composite wear-resistant structure: High chromium alloy layer with hardness reaching HRC62-65, wear-resistant and impact-resistant; PTFE coating reduces friction, suitable for heavy-duty and dusty conditions, reducing journal scratches.

Anti-rotation and positioning: Equipped with anti-rotation grooves to prevent circumferential rotation after installation, improving assembly accuracy and stability, and avoiding abnormal wear caused by loosening.

Highly adaptable: Compatible with various Caterpillar heavy machinery pins/trunnions, cylinder guide sleeves, etc., easy to install, can be directly press-fitted without complex tooling.

Long-lasting and durable: Composite material and coating design, suitable for frequent impacts and dusty environments, fatigue life of over 8000 hours, reducing replacement frequency.

Installation and maintenance points: Before installation, clean the journal and mounting hole, check the sleeve for cracks and coating peeling; install using cold pressing method (press-in with special tooling), align the anti-rotation groove with the locating pin, after installation, rotate freely, and the clearance should be 0.04-0.10 mm.

Maintenance every 2500 hours: Check sleeve wear (replace when radial wear > 0.3 mm), clean surface oil, replenish NLGI 2 lithium-based grease, check the fit clearance and anti-rotation groove condition, replace if necessary.

Prioritize original parts. Aftermarket parts may have insufficient wear-resistant layer thickness or insufficient hardness, easily leading to premature wear, journal damage, and affecting normal equipment operation.